Dental bridge-work construction



May 21, 1929. F. s. TRUSLER 1,714,059

DENTAL BRI I JGE WORK CONSTRUCTION Filed Dec. 31, 1927 2 Sheets-Sheet l Attarmgy MWUHIIL fn'ventflr Z 5.,Z7wa/ r May 21, 1929 F. s. TRUSLER DENTAL BRIDGE WORK CONSTRUCTION Filed D90. 51, 1927 2 Sheets-Sheet 2 Inwentor Z 5. pas/er Patented May 21, 1929.

UNITED STATES FRANK s. TRUSLER,

or VERNON, rpExAs.

DENTAL BRIDGE-WORK CQNSTRUCTION.

I Application filed December This invention relates to a permanent dental bridge work structure, adapted more especially for use in association with posterior, back, or jaw teeth. 1

My principal aim is to providea bridge work structure which is-individualized .by the presence of a pair of abutment crowns for permanent anchorage on existing teeth, wherein these crowns carry an intervening truss-bar which constitutes a mounting for gold dummy crowns, and artificial porcelain teeth. 1

One object is to effect a noticeable saving in gold, to reduce theweight of the complete bridge, to enhancethe appearance, to make the structure susceptible of easy cleaning, and to provide a bridge work structure capable of providing a worthy substitute for known patented, and mara structure of this class, which serves to promote economy fromthe standpoint of installation and use, which further promotes practicability, andmakes the structure commercially eligible from a competitive standpoint. I Y I I aim, also, to provide a structure of th1s class which is especially suitable for the purpose for which it is intended, something which is more modern, and which is unequaled in the art, particularly because of the fact that it is sufiiciently sturdy to with stand the pressures to which it is subjected.

Other features, such as for example the method of application and assembly, will become more readily apparent from the fol lowing description and drawings In the drawings:

Figure 1 is a side elevational view of a portion of an upper and lower jaw wherein the upper jaw has a series of four teeth extracted therefrom.

'Fig. 2 is a view like Fig. 1, showing the improved bridge, occupying the vacant space, and attached to the permanent teeth and equipped with wax for taking the impression of the occlusal surfaces of the lower cooperating teeth. I

Fig. 3 is a perspective view of the bridge work removed and with the porcelain artificial teeth removed.

Fig. 4 is a View showing the porcelain ce- 31, 1927. Serial m5. 243,930.

casted, gold dummy crown. Fig. '5 is a view like Fig. 2, showing the complete gold casted bridge work replaced for permanent disposition in the mouth.

Fig. 6 is a piecemeal view showing the details'separated. i

In order that a clear comprehension of the separate details of the improved struc-" ture may be had, attention is first invited to Fig. 6, wherein it will be seen that the reference numerals 7 and 8 designate what are herein termed abutment crowns. Instead of being in the form of complete caps, as is usual, these crowns are in the form of annular .gold' bands properly shaped for permanent anchorage upon the existing teeth and open. at their bottom for reception of a gold filling.

Cemented to, and cooperable with the crown is a fiattruss bar, 9 which constitutes a mounting for the artificial teeth 10, and the gold dummy crowns 11. In connection, with the artificial teeth, I desire to mention that these constitute elements of a single baked body,.12, it being my idea to make these artificial teeth in groups of two,three,

four or five. Each individual artificial tooth is formed with a bored socket 13 to accommodate one .ofthe pins 14 which in the present instance extend through openings 15 formed at proper points in the bar 9.

Attention is now invited to Fig. 1, where- The reference numeral QOdesignates generally the lower jaw equipped with permanent teeth 21. In accordance with my method of installation, and by directing attention to Fig. 2 it will be observed that the band or crown 7 is fitted onto the tooth 18, while the crown 8 is fitted on the tooth 19. Thus, the bridge bar 9, which is connected by cement at its opposite ends to these crowns, spans the. space between the teeth lain body 12.

18 and 19, leaving a space above and below.

The space between the upper side of the bar 9 and the gum is occupied by the porce- Incidentally, the shape of this body is such that the curved edge is spaced slightly from the gum, to provide clearance and to prevent direct pressure against the gum. In Fig. 2, the pins 14 have been placed through the openin s-15 in the bar 9, with their upper end portions located in the sockets 13 in the-porcelain teeth. The lower end portions of the pins which project down below the bar 9, are embedded in wax or equivalent material 22, which is temporarily used for taking the impression of the occlusal surfaces of the teeth 21.

After the impression is thus takenin the wax, the complete bridge including'the dummy crowns 7 Land 8 is removed. In addition, the porcelain body 12 is separated so that the details now appear as shown in Fig.- 3. The porcelain is removed before the casting is done in order to prevent breakage of the porcelain from undue heat.

The structure shown in Fig. 3 is now invested -in crown and bridge material made ofplaster :Paris, marble dust, sand and asbestos. These ingredients aremixed with water in a regular rubber plaster bowl, placed .overand-almost around the gold parts to be soldered together, and then the gold part is flown with a blow pipe. After the bridge is allowed to cool, it is removed. from the bridge investments, and cleaned off, the flame from the blow pipe being thrown on the work as it is held with soldering pliers.

When the bridge gets. substantially red hot, it is thrown into a forty per cent solution of sulphuric acid, in a tea cup. This removes all of the oxidation Then it is thrown into another cup of ordinary soda water to kill the acids. Then the bridge is smoothed and polished and tried into the patients mouth to make a perfect fit.

Next, it is removed, cleaned and dried, and the porcelain body is cemented in place on the pin. Then the bridge is complete, and replaced in the mouth and permanently cemented in place.

The various advantages which accompany a construction of this class will be quite clear to persons skilled in the art to which the in vention relates. Consequently, a more explicit description is regarded unnecessary.

Qhangesin shape, size, numerical numbers, and materials, may be resorted to within the scope of the adjoined -cla-ims.

Having thus described my invention, what I claim as new is: a

1. In a dental bridge work structure of the class described, an apertured mounting bar, means at the 'ends of said bar for anchoring it in the mouth, artificial teeth resting on top of the bar and provided with sockets, pins receivable in said sockets and extending down through the epenings in said bar, and dummy crowns carried by said bar; the lower end portions of said pins being embedded in said crowns.

2. In a dental bridge work structure of the class described, a pair of anchoring crowns ot annularform adapted to embrace permanent teeth, a truss-bar disposed between and connected at its ends to said crowns and disposed or located between the top and bottom portions of the crownasaid bar being provided with longitudinally spaced openings, a porcelain body resting upon the top of said bar, and located between the crowns and fashioned to represent artificial teeth, the individual teeth having sockets, pins extending throughtthe openings in saidbar and cemented in said sockcts,..and a film of material secured to the under side of said bar with its end portions providing fillings for said anchoring crowns, said film of material having impressions formed therein whereby to provide :the same with an 'occlusal surface.

In testimony whereof I aiiix my signature.

FRANK S. TRUSLER. 

